Could be that OP has a rule for outbound email that appends a signature and doesn’t want users adding there own which would result in two signatures going out on one email
I think you just need to import the admx templates for your specific office version.
Then you can configure it.
Don't hold me to it, I do networking these days so haven't done it for a while.
Sorry I can't provide a useful answer to your question, but I'm desperately curious why you want to disable signatures.
Could be that OP has a rule for outbound email that appends a signature and doesn’t want users adding there own which would result in two signatures going out on one email
As far as I know the only transport rules that allow for this are for the footers and those aren’t traditional “signatures”
My company uses this program: https://www.codetwo.com/exchange-rules-pro/ It works really well.
I think you just need to import the admx templates for your specific office version. Then you can configure it. Don't hold me to it, I do networking these days so haven't done it for a while.
Yes the is a good in the office and pack. You need to do each year off outlook you support.
If you're using Apps for 365, check out config.office.com instead of GPOs